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What is DNS and Application Layer Overview about?

The document provides an overview of the application layer in computer networks. It discusses several key application layer protocols including HTTP, FTP, email, Telnet, SSH, DNS, and SNMP. It then focuses on the World Wide Web and its components, describing how the client-server model works with browsers making requests to web servers using HTTP. Proxies are also introduced as intermediaries that cache responses to improve performance. Uniform resource locators (URLs) are defined as uniquely identifying re

Author

N.D.Surendhar

Language

EN